421070401 has 4 divisors (see below), whose sum is σ = 435590100. Its totient is φ = 406550704.

The previous prime is 421070393. The next prime is 421070413. The reversal of 421070401 is 104070124.

It is a Cunningham number, because it is equal to 20520²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220819600 + 200250801 = 14860^2 + 14151^2 .

It is a cyclic number.

It is not a de Polignac number, because 421070401 - 2³ = 421070393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421070201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7259806 + ... + 7259863.

It is an arithmetic number, because the mean of its divisors is an integer number (108897525).

Almost surely, 2^421070401 is an apocalyptic number.

It is an amenable number.

421070401 is a deficient number, since it is larger than the sum of its proper divisors (14519699).

421070401 is a wasteful number, since it uses less digits than its factorization.

421070401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14519698.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 421070401 is about 20520.0000243665. Note that the first 4 decimals coincide. The cubic root of 421070401 is about 749.5228971541.

The spelling of 421070401 in words is "four hundred twenty-one million, seventy thousand, four hundred one".